Prelithiated negative electrode plate, preparation method of lithium supplementation composite layer, lithium supplementation method, secondary battery, and electronic apparatus

Abstract

A prelithiated negative electrode plate includes a negative electrode current collector, a third negative electrode material layer, and a fourth negative electrode material layer, where the third negative electrode material layer is disposed between the negative electrode current collector and the fourth negative electrode material layer, the third negative electrode material layer includes a first negative electrode active material, the fourth negative electrode material layer includes a second negative electrode active material, and the second negative electrode active material includes a silicon-containing substance; and a mass percentage of silicon element in the third negative electrode material layer is WSi3%, a mass percentage of silicon element in the fourth negative electrode material layer is WSi4%, and a mass percentage of lithium element in the fourth negative electrode material layer is WLi4%, where WSi4>WSi3, and 1.5%≤WLi4/WSi4≤44.4%.

Dependencies are inferred from the claim text.